windows: run "go generate"
Change-Id: Ide01e409af85a5e2615ba647b44eda67bc14c07f
Reviewed-on: https://go-review.googlesource.com/33812
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/windows/registry/zsyscall_windows.go b/windows/registry/zsyscall_windows.go
index 0fa24c6..1ea1c23 100644
--- a/windows/registry/zsyscall_windows.go
+++ b/windows/registry/zsyscall_windows.go
@@ -3,13 +3,39 @@
package registry
import (
- "golang.org/x/sys/windows"
"syscall"
"unsafe"
+
+ "golang.org/x/sys/windows"
)
var _ unsafe.Pointer
+// Do the interface allocations only once for common
+// Errno values.
+const (
+ errnoERROR_IO_PENDING = 997
+)
+
+var (
+ errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
+)
+
+// errnoErr returns common boxed Errno values, to prevent
+// allocations at runtime.
+func errnoErr(e syscall.Errno) error {
+ switch e {
+ case 0:
+ return nil
+ case errnoERROR_IO_PENDING:
+ return errERROR_IO_PENDING
+ }
+ // TODO: add more here, after collecting data on the common
+ // error values see on Windows. (perhaps when running
+ // all.bat?)
+ return e
+}
+
var (
modadvapi32 = windows.NewLazySystemDLL("advapi32.dll")
modkernel32 = windows.NewLazySystemDLL("kernel32.dll")
@@ -76,7 +102,7 @@
n = uint32(r0)
if n == 0 {
if e1 != 0 {
- err = error(e1)
+ err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
